Spray Encapsulation of Iron in Chitosan Biopolymer for Tea Fortification
Table 2
Relative atomic abundance of elements at the surface of microcapsules analyzed by XPS at 10 nm depth.
Peaks (P)\peaks
Relative atomic abundance % wt
Av. particle size
Position (pos.)
C1s
O1s
S2p
Fe2p
μm ± SD
Chitosan
62.75
37.16
0.02
0.07
3.55 ± 1.81
CH30Fe
63.49
32.56
1.26
2.68
4.35 ± 1.53
CH40Fe
61.71
33.44
1.33
3.52
2.06 ± 0.68
CH30FeMD
55.48
41.73
1.28
1.52
4.32 ± 1.93
CH40FeMD
55.18
41.86
1.46
1.50
10.98 ± 4.71
CH40FeMDST
65.97
30.28
2.21
1.50
10.27 ± 1.24
CH50FeTPP
53.65
39.79
1.78
4.78
3.75 ± 2.08
Elemental chemical states C1s, O1s, S2p, and Fe2p were chosen as primary XPS regions to quantify elements. Average particle size was determined by SEM.
